Miter joint



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CURTIS E. SMITH, Ol? ST. JOSEPH, MISSOURI.

MITEB JO INT,

Specification of Letters Patent.

Patented May 23, 1922.

Application filed May 31, 1921. Serial No. `473,821.

To (itl fr/tom. t mczfz/ concern.'

`Be it known that l, CUirris E. Sierre, a citizen ofthe United States,residingat St. Joseph.l in the county of Buchanan and State of.lrlissourh haveinvented certain new and useful Improvements in hliterJoints, of which the following is a specification.

This invention relates to miter joints, `and particularlyto a jointadaptable for use. 1n joining the members of a gable or cornice, on'stairways heuse trim, and in other can pentry and joinery work.

An object is to provide a miter joint in which a heel is let into themiter thus p reventing slipping` when toenailingI and' doing away withthe necessity of first gluing or clamping` the two members.

A further object resides in so constructing the miter that the twomembers can not slip and will need no nailing when they are placed toabut in a corner, as 1n the case of a baseboard.

A still further object is to provide a joint which while constructed toprevent slipping and give a solid abutment between the two members isyet so constructed that on its outer or finished side it presents theappearance of the usual miter joint.

. Another object lies in so cutting and associating the members that abroken joint is formed which will be substantially air and water tightwhen the members are secured together and will eliminate the necessityof resorting to the present expedient of using glue blocks to back upand strengthen the corner.

With these and other objects in view which will be apparent from thedrawings, specification and claims this invention includes certain novelfeatures of construction and combinations of parts which will now be setforth.

ln the drawings:

Figure il is a plan view showing the joining of two members inaccordance with my invention.

Fig. 2 is a perspective view showingr the two members.

Fig. 3 is a perspective view "illustrating` the formation of the jointon a diagonal line.

Fig. 4l is a perspective view to better disclose the cutting of the twomembers in F ig. 8.

Fig. 5 is a plan View illustrating the adaptation of the joint forframes and the like.

Fig.` 6 is a perspective view to better show theformation ofthe twomembers in Fig. 5.

ll/lyinvention contemplates the association of two members by the use ofa miter joint, andfthis joint canfbe employed in theconstruction ofgables, hip joints, eaves, cornices, Vandthe like; in the interior trimof buildings, 4and in trimming out stairways and associating trim ormoldings of any character; in making picture and screen frames, andconnecting the members of refrigerator and like cases where air or watertight joints are desired; and, in fact in any connection where anordinary miter joint might be used and in some places where the usualmiter will not be satisfactory.

In the embodiment shown in Fig. 1 the members 1 and 2 have their endscut to form the miter faces 3 and 4. An offset heel 5 is cut on themember 1 to give an abutment face 6 substantially parallel with theouter face of this member and an abutment face 7 at right angles. Themember 2 is notched in its miter face l to receive the offset heel 5 andhas abutment faces 8 and 9 which fit and bear against the abutment faces6 and 7.

As shown in Fig. 2 the offset heel and the notch are formed along theextent of the miter faces and a broken joint is thus provided when theparts are assembled as illustrated in Fig. 1. The contact of theabutment faces will prevent the joint from lipping when toenailing tosecure the memers.

ln the adaptation in Figs. 3 and l the joint is formed in a mannersubstantially identical with the showing as described, eX- cept that thepieces 10 and 11 are cut across diagonally at 12, the miter faces 13 and14 and the offset heel 15 and notch 16 being cut to follow the diagonalline. rlhis cut may be employed in gables, cornices, eaves` and thelike, and in joining the risers of stairways.

The joint illustrated in Figs. 5 and 6 is particularly adapted forjoining the mem` bers of picture. screen, or other frames, for windowand door trim, and in other con nections where the appearance of theusual miter joint is desired on the finished side.

in this adaptation the members 17 and 18 are iormed with the initerfaces 19 and 20, which extend entirely across the members on thefinished side. On the rear side ot member 1r a notch l21 is cut at theinner corner of the miter face, this notch having the angnlarly disposedabutment faces 2Q and 23. An oiiset heel 24E is provided on the miterface 2O oi? member 18 and has abutment faces 25 and 26 which contactwith the abutment faces of the notch 21.

W hile I have herein shown and described only specific embodiments oi'my invention and have mentioned only certain possible adaptations inuse, it will be appreciated that my improved miter joint may be formedin a number of different ways for use in various connections, in view ofwhich I do not limit myself to such specific details as herein setforth,` but may resort to any practical modiiications falling within thescope of the invention as defined in the appended claims.

l claim 1. 1n a niiter joint, a pair oi' members the end oi' one memberbeing provided with two surfaces disposed in intersecting' planes andextending unbroken from the line of intersection to the opposite sidesoi said first member whereby a mitered end having; n heel is provided,the end ot the second member being provided with two `faces disposed inintersecting planes and connected at their inner ends by a third planesnrface, the first two of the second set ofE sur Yfaces extendingunbroken from the connecting surface to the opposite sides of the seeondmember` whereby the second nieinber is provided with a, mitered endhaving; :ibut- Inent faces to receive the heel o f the fil'sl member.

2. A structure as defined in claim l. wherein the abutment faces aretriangular in contour.

in testimony whereof l afiix niy signature.

CURTIS E. SMITH.

